High mileage people tend to only fill up when empty.
I normally fill up when below half as my local station is quite unreliable and often runs out of fuel.
Anywhere in between is perfectly fine but do NOT run out of fuel.
Normal Unleaded petrol will be fine.
Yes, I agree, you are missing a cable.
When I collected mine it was connected to a charger with "my" cable. It would be easy to assume that this cable belonged to the dealer.
Long wait but at least you have your car. I was told the same as yourself.
I think that the second key (when it eventually arrives) will be a full key.
I'm not sure if you constantly run on battery (no petrol engine) the 12v "engine battery" will eventually go flat.
You would think that "the car" would monitor everything and run the engine when required or at least give you some sort of warning.
I can't believe that you received a "wrong car too" 🙈
I know exactly how you feel. Totally rubbish after waiting for a year.
Hopefully your dealer sorts it out.